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1 " Much of the signal system was installed in the 1930s and transit employees now have to fabricate their own replacement parts for obsolete equipment. While subway riders have to rely on this century-old technology, New York's automobile drivers take advantage of traffic signals that are part of a sophisticated information network. Above the streets, the city's Department of Transportation monitors data from sensors and video cameras to identify congestion choke points, and the remotely adjusts computerized traffic signals to optimize the flow of vehicles. Drivers obtain accurate, real-time traffic condition information via electronic signals, computers and smartphones. "
― Philip Mark Plotch, , Last Subway: The Long Wait for the Next Train in New York City
